JP2016061974A - Imaging system, illumination device, and control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine a radiation direction of an illumination device by a method suitable for the use of an optical member for changing a radiation range.SOLUTION: An imaging system comprises: an illumination device capable of automatically driving a movable part including a light emission part for changing a radiation direction of the light emission part; and an imaging device. The imaging system includes: judgement means for judging whether an optical member capable of expanding a radiation range of the light emission part is present or not in a position forward in the radiation direction of the light emission part; and determination means for determining the radiation direction of the light emission part. The determination means makes a method, for determining the radiation direction of the light emission part, different depending on whether the optical member capable of expanding the radiation range of the light emission part is present or not in the position forward in the radiation direction of the light emission part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to control of an illumination device that can automatically change an irradiation direction.

  2. Description of the Related Art Conventionally, flash photography (hereinafter referred to as bounce flash photography) is known in which light from a lighting device is irradiated toward a ceiling or the like and a subject is irradiated with diffuse reflected light from the ceiling or the like. According to the bounce flash photography, the subject can be irradiated with light from the illumination device indirectly instead of directly, so that it is possible to depict with soft light.

  In Patent Document 1, the distance to the subject that is in focus and the reflecting surface is acquired based on the lens position of the focus lens when the focus of the photographing lens matches the subject, and based on the acquired distance. A technique for obtaining an optimum bounce angle is described.

JP 2009-163179 A

  In addition, an optical member (hereinafter referred to as a bounce adapter) that is attached to a lighting device and used for bounce flash photography is known in order to approximate a more natural description. If the ceiling is used as a reflective surface in bounce flash photography, a shadow will appear on the neck under the subject's chin, but by bounce flash photography with a bounce adapter attached, diffuse light from the bounce adapter is emitted from the front. , Submandibular shadow can be reduced.

  There is also known an illuminating device that incorporates a diffusion panel that can be moved between a storage position and a position in front of the irradiating direction as an optical member that diffuses irradiation light of the illuminating device.

  However, the technique disclosed in Patent Document 1 described above is not considered for the case where a bounce adapter or a diffusion panel is used. Therefore, even when using a bounce adapter or diffuser panel, the same control is performed, so that the light irradiated to the subject at the time of bounce flash photography may not be optimal, resulting in an unnatural image. .

  In view of the above, an object of the present invention is to make it possible to determine the irradiation direction of a lighting device by a method suitable for using an optical member that changes the irradiation range.

  In order to achieve the above-described goal, an imaging system according to the present invention includes an illumination device capable of automatically driving a movable unit including the light emitting unit to change the irradiation direction of the light emitting unit, and an imaging device A determination means for determining whether or not there is an optical member capable of expanding the irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction; Determining means for determining an irradiation direction, wherein the determining means determines whether or not there is an optical member capable of expanding an irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction. Accordingly, the method of determining the irradiation direction of the light emitting unit is different.

  ADVANTAGE OF THE INVENTION According to this invention, the irradiation direction of an illuminating device can be determined by the method suitable when using the optical member which changes an irradiation range.

1 is a block diagram illustrating a schematic configuration of an imaging system according to an embodiment of the present invention. 1 is a block diagram illustrating a schematic configuration of an imaging system according to an embodiment of the present invention. It is a figure which shows the flowchart of the various processes of the camera main body 100 which concerns on auto bounce flash photography. It is a figure which shows the flowchart of the various processes of the camera main body 100 which concerns on auto bounce flash photography. It is a figure which shows the bounce process of the strobe device. It is a figure which shows strobe device 300 bounce drive control. FIG. 3 is an external view showing a tilt state and a tilt state of the strobe device 300. It is a figure which shows the rotation range of the up-down direction of the strobe head part 300b, and the left-right direction. It is a figure which shows allocation of the gray code and rotation angle of a rotary encoder. It is a figure which shows the detection result of the rotary encoder of an up-down direction and a left-right direction. 3 is a diagram illustrating an example of data communication between a camera main body 100 and a flash device 300 via a terminal 130. FIG. 3 is a diagram showing a command list in communication between the camera body 100 and the flash device 300. FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 show a schematic configuration of an imaging system (consisting of a digital camera, a lens, and a strobe device) according to the first embodiment of the present invention. The imaging system according to the present embodiment includes a camera body 100 that is an imaging device, a lens unit 200 that is detachably attached to the camera body 100, and a flash device 300 that is an illumination device that is detachably attached to the camera body 100. . In FIG. 1 and FIG. 2, the same components are denoted by the same reference numerals.

  First, the configuration inside the camera body 100 will be described. A microcomputer CCPU (hereinafter, camera microcomputer) 101 controls each part of the camera body 100. The camera microcomputer 101 has a one-chip IC circuit configuration with a built-in microcomputer including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D, D / A converter, etc. It has become. The camera microcomputer 101 can control the imaging system with software, and performs various condition determinations.

  The image sensor 102 is an image sensor such as a CCD or CMOS including an infrared cut filter, a low-pass filter, and the like, and a subject image is formed by the lens group 202 described later at the time of photographing. The shutter 103 moves to a position where the image sensor 102 is shielded from light and a position where the image sensor 102 is exposed.

  The main mirror (half mirror) 104 reflects a part of light incident from the lens group 202 and forms an image on the focusing plate 105, and an optical path (photographing optical path) of the light incident from the lens group 202 to the image sensor 102. ) Move to the retreat position from inside. A subject image is formed on the focusing screen 105, and the formed subject image is confirmed by a user via an optical finder (not shown).

  The photometry circuit (AE circuit) 106 includes a photometry sensor in the circuit, divides the subject into a plurality of areas, and performs photometry in each area. The photometric sensor in the photometric circuit 106 expects a subject image formed on the focus plate 105 via a pentaprism 114 described later. The focus detection circuit (AF circuit) 107 includes a distance measuring sensor having a plurality of distance measuring points in the circuit, and outputs focus information such as a defocus amount of each distance measuring point.

  The gain switching circuit 108 amplifies the signal output from the image sensor 102, and the gain switching is performed by the camera microcomputer 101 in accordance with shooting conditions, user operation, and the like.

  The A / D converter 109 converts the analog signal output from the amplified image sensor 102 into a digital signal. A timing generator (TG) 110 synchronizes the input of the amplified analog signal of the image sensor 102 and the conversion timing of the A / D converter 109.

  The signal processing circuit 111 performs signal processing on the image data converted into a digital signal by the A / D converter 109.

  The communication line SC is a signal line for an interface between the camera body 100, the lens unit 200, and the strobe device 300. For example, the camera microcomputer 101 is used as a host to exchange information such as data exchange and command transmission. The terminal 120 includes an SCLK_L terminal for synchronizing communication between the camera body 100 and the lens unit 200, a MOSI_L terminal for transmitting data to the lens unit 200, and a MISO_L terminal for receiving data transmitted from the lens unit 200. Also included is a GND terminal that connects both the camera body 100 and the lens unit 200.

  Terminal 130 includes an SCLK_S terminal for synchronizing communication between camera body 100 and strobe device 300 and a MOSI_S terminal for transmitting data from camera body 100 to strobe device 300. Further, terminal 130 includes a MISO_S terminal that receives data transmitted from strobe device 300. Also included is a GND terminal that connects both the camera body 100 and the strobe device 300. An example of data communication via the terminal 130 is shown in FIG. FIG. 11A shows the timing of data communication. When data is transmitted from the camera microcomputer 101 to the flash microcomputer 310, the data is serially transmitted by setting each bit to 0 and 1 from the MOSI_S terminal in synchronization with the 8-bit clock of the SCK_S terminal. When data is transmitted from the flash microcomputer 310 to the camera microcomputer 101, data with each bit set to 0 and 1 is serially received from the MISO_S terminal in synchronization with the 8-bit clock of the SCK_S terminal. In FIG. 11 (a), signals are read and written at the rising edge of the SCLK_S signal in 8-bit (1 byte) communication, but this 8-bit communication is continuously transmitted a plurality of times with command, command data, and data. . FIG. 11B is a specific example of information to be communicated, and is transmitted from the camera microcomputer 101 to the flash microcomputer 310 in accordance with a command list shown in FIG.

  As an example, for “auto-bounce setting / cancellation from camera to strobe”, CS communication 80H in the first byte, command number 011 (0BH) in the second byte, and 01 (setting) of data (content) in the third byte Is converted from hexadecimal to binary and transmitted.

  In the first byte, the command CS: 80H is used when information is transmitted from the camera body 100 to the flash device 300, and the command SC: 01H is received from the camera body 100 when the camera body 100 acquires information from the flash device 300. Transmit to device 300. In the second byte, the command number is a number following SC and CS (converted to a hexadecimal number at the time of transmission). In the third or fourth byte, setting item data is stored in the camera body 100 and the strobe device. One of 300 transmits to the other. The communication of other information will be described as needed using the command list shown in FIGS. 12 (a) and 12 (b).

  The input unit 112 includes operation units such as a power switch, a release switch, and a setting button, and the camera microcomputer 101 executes various processes in response to an input to the input unit 112. When the release switch is operated in one step (half-pressed), SW1 is turned on, and the camera microcomputer 101 starts photographing preparation operations such as focus adjustment and photometry. Further, SW2 in which the release switch is operated in two steps (fully pressed) is turned ON, and the camera microcomputer 101 starts photographing operations such as exposure and development processing. In addition, various settings of the strobe device 300 attached to the camera body 100 can be performed by operating a setting button or the like of the input unit 112. A display unit 113 having a liquid crystal device and a light emitting element displays various set modes, other shooting information, and the like.

  The pentaprism 114 guides the subject image on the focusing screen 105 to a photometric sensor in the photometric circuit 106 and an optical viewfinder (not shown). The sub mirror 115 guides the light incident from the lens group 202 and transmitted through the main mirror 104 to the distance measuring sensor of the focus detection circuit 107.

  The posture detection circuit 140 is a circuit that detects a posture difference, 140a is a posture H detection unit that detects a posture difference in the horizontal direction, 140b is a posture V detection unit that detects a posture difference in the vertical direction, and 140c is a front-rear direction (Z direction). ) Is a posture Z detector for detecting a posture difference. For the posture detection circuit 140, for example, an angular velocity sensor or a gyro sensor is used. Attitude information regarding the attitude difference in each direction detected by the attitude detection circuit 140 is input to the camera microcomputer 101.

  Next, the configuration and operation within the lens unit 200 will be described. A microcomputer LPU (hereinafter, lens microcomputer) 201 controls each part of the lens unit 200.

  The lens microcomputer 201 has a one-chip IC circuit configuration with a built-in microcomputer including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D, D / A converter, and the like. It has become.

  The lens group 202 includes a plurality of lenses including a focus lens and a zoom lens. The lens group 202 may not include a zoom lens. The lens driving unit 203 is a driving system that moves the lenses included in the lens group 202. The driving amount of the lens group 202 is determined in the camera microcomputer 101 based on the output of the focus detection circuit 107 in the camera body 100. Calculated. The calculated drive amount is transmitted from the camera microcomputer 101 to the lens microcomputer 201. The encoder 204 is an encoder that detects the position of the lens group 202 and outputs drive information. Based on the driving information from the encoder 204, the lens driving unit 203 moves the lens group 202 by the driving amount to adjust the focus. A diaphragm 205 that adjusts the amount of light passing therethrough is controlled by the lens microcomputer 201 via a diaphragm control circuit 206.

  Next, the configuration of the strobe device 300 will be described. The strobe device 300 includes a main body portion 300a that is detachably attached to the camera main body 100, and a strobe head portion 300b that is a movable portion that is rotatably held in the vertical and horizontal directions with respect to the main body portion 300a. The In this embodiment, the rotation direction of the strobe head unit 300b is defined with the side connected to the strobe head unit 300b in the main body unit 300a as the upper side.

  A microcomputer FPU (hereinafter, strobe microcomputer) 310 controls each part of the strobe device 300. The strobe microcomputer 310 has a one-chip IC circuit configuration with a built-in microcomputer including, for example, a CPU, ROM, RAM, input / output control circuit (I / O control circuit), multiplexer, timer circuit, EEPROM, A / D, D / A converter, and the like. It has become.

  The battery 301 functions as a power source (VBAT) for the strobe device 300. The booster circuit block 302 includes a booster 302a, resistors 302b and 302c used for voltage detection, and a main capacitor 302d. The booster circuit block 302 boosts the voltage of the battery 301 to several hundred volts by the booster 302a and charges the main capacitor 302d with electric energy for light emission.

  The charging voltage of the main capacitor 302d is divided by the resistors 302b and 302c, and the divided voltage is input to the A / D conversion terminal of the strobe microcomputer 310. The trigger circuit 303 applies a pulse voltage for exciting a discharge tube 305 described later to the discharge tube 305. The light emission control circuit 304 controls the start and stop of light emission of the discharge tube 305. The discharge tube 305 receives and excites a pulse voltage of several KV applied from the trigger circuit 303, and emits light using electric energy charged in the main capacitor 302d.

  The distance measuring unit 308 detects the distance to the object by a known method. For example, the distance measuring unit 308 has a light receiving sensor, and the light received from the discharge tube 305 and reflected by the object in the irradiation direction is received by the light receiving sensor. It receives light and detects the distance to the object. Alternatively, the light source further includes a light source for distance measurement, and the light received from the light source for distance measurement and reflected by the object in the irradiation direction is received by the light receiving sensor, and the distance to the object is detected. The light receiving result may be output to the strobe microcomputer 310 by the distance measuring unit 308, and the distance to the object may be calculated by the strobe microcomputer 310.

  The integrating circuit 309 integrates a light receiving current of a photodiode 314 described later, and its output is input to an inverting input terminal of a comparator 315 described later and an A / D converter terminal of the strobe microcomputer 310. A non-inverting input terminal of the comparator 315 is connected to a D / A converter terminal in the flash microcomputer 310, and an output of the comparator 315 is connected to an input terminal of an AND gate 311 described later. The other input of the AND gate 311 is connected to the light emission control terminal of the flash microcomputer 310, and the output of the AND gate 311 is input to the light emission control circuit 304. The photodiode 314 is a sensor that receives light emitted from the discharge tube 305, and receives light emitted from the discharge tube 305 directly or via a glass fiber or the like.

  The light emitting unit of the strobe head unit 300b mainly includes a discharge tube 305, a reflector 306, and a zoom optical panel 307. The reflector 306 reflects the light emitted from the discharge tube 305 and guides it in a predetermined direction. The zoom optical panel 307 is a panel that transmits and emits the light emitted from the discharge tube 305 and the light reflected by the reflector 306, and is fixed so that one surface forms the outer surface of the strobe device 300. By changing the relative position with the zoom optical panel 307 without changing the positional relationship between the discharge tube 305 and the reflector 306, the guide number and irradiation range of the strobe device 300 can be changed. The irradiation direction of the light emitting unit is changed by the rotation of the strobe head unit 300b.

  The input unit 312 includes operation units such as a power switch, a mode setting switch for setting the operation mode of the strobe device 300, and setting buttons for setting various parameters. The strobe microcomputer 310 responds to an input to the input unit 312. Various processes.

  A display unit 313 including a liquid crystal device and a light emitting element displays each state of the strobe device 300.

  The zoom drive circuit 330 is a zoom drive unit 330b including a zoom detection unit 330a that detects information related to the relative positions of the discharge tube 305 and the zoom optical panel 307 using an encoder, and a motor that moves the discharge tube 305 and the reflector 306. Composed.

  The driving amounts of the discharge tube 305 and the reflector 306 are calculated based on the focal length information by the stroboscopic microcomputer 310 that acquires the focal length information output from the lens microcomputer 201 via the camera microcomputer 101.

  The bounce circuit 340 includes bounce position detection circuits 340a and 340c that detect a rotation angle amount of the strobe head unit 300b (a rotation angle with respect to the main body unit 300a) and bounce drive circuits 340b and 340d that rotate the strobe head unit 300b. Is done.

  The bounce position detection circuit (bounce H detection circuit) 340a detects the rotation angle amount of the strobe head unit 300b in the left-right direction with a rotary encoder or an absolute encoder. The bounce position detection circuit (bounce V detection circuit) 340c detects the amount of vertical rotation angle of the strobe head unit 300b with a rotary encoder or an absolute encoder.

  A bounce drive circuit (bounce H drive circuit) 340b uses a known motor to drive the strobe head unit 300b in the horizontal direction, and a bounce drive circuit (bounce V drive circuit) 340d uses a known motor to drive the strobe head unit 300b in the vertical direction. Do.

  Here, an example of the rotation range and detection method of the strobe head unit 300b of the strobe device 300 will be described with reference to FIG. 8, FIG. 9, and FIG. FIG. 8 is a diagram illustrating the vertical and horizontal rotations of the strobe head unit 300b, FIG. 9 is a diagram illustrating the allocation of gray codes and rotational angles of the rotary encoder, and FIG. 10 is the vertical and horizontal rotations. It is a figure which shows the output of a rotary encoder.

  As shown in FIG. 8A, the strobe head portion 300b is held so as to be rotatable in the vertical direction with respect to the main body portion 300a. As shown in FIG. It is held so as to be rotatable in the left-right direction with respect to 300a. It should be noted that the vertical position of the strobe head unit 300b is 0 degree in FIG. 8A and the horizontal position is 0 degree in FIG. 8B as the reference position of the strobe head part 300b. To do. In each state of FIG. 8, the index indicated by a circle and a line corresponds to the position of the rotary encoder shown in FIG.

  FIG. 9A shows a configuration in which the vertical rotation angle is detected by a rotary encoder using a 4-bit gray code. FIG. 9B shows the horizontal rotation angle of 4-bit. A configuration for detection by a rotary encoder using a gray code is shown.

  The detection part of the rotary encoder that detects the rotation in the vertical direction and the rotary encoder that detects the rotation in the horizontal direction has a known configuration using a photo reflector, a photo interrupter, or the like. In the present embodiment, it is assumed that the rotary encoder outputs 0 in the white part and 1 in the black part shown in FIG. Further, it is determined at the rising edge of the bit change during the rotation operation, and the pattern data is read when the operation is stopped.

  As shown in FIG. 10, the rotary encoder outputs a different signal according to the rotation angle of the strobe head unit 300b, so that the bounce position detection circuits 340a and 340c can detect the drive amount of the strobe head unit 300b.

  The posture detection circuit 360 is a circuit that detects a posture difference, and the posture H detection unit 360a detects a tilt amount γ of the main body 300a based on the normal position state of the main body 300a shown in FIG. . The posture V detection unit 360b detects a tilt amount ε of the main body 300a when the vertical position of the main body 300a shown in FIG. As shown in FIG. 7C, the posture Z detection unit 360c detects an inclination η for determining whether the main body unit 300a is the normal position or the vertical position. For the posture detection circuit 360, for example, an angular velocity sensor or a gyro sensor is used.

  The bounce adapter 370 is an optical accessory that can be attached to and detached from the strobe device 300. The bounce adapter 370 has a box shape having an opening for attaching to the strobe device 300, and surrounds a part of the strobe head portion 300b when attached to the strobe device 300. The bounce adapter 370 is attached to the strobe device 300 and extends in the direction of the strobe head unit 300b from the first region facing the zoom optical panel 307 and facing the zoom optical panel 307 by a predetermined distance. Having a second region; When the bounce adapter 370 is used at the time of bounce flash photography, the light transmitted through the second region is irradiated to the subject while irradiating the subject with the reflected light reflected from the ceiling or the like through the first region from above or from the side. It can be irradiated from the front. As described above, when the bounce adapter 370 is used at the time of bounce flash photography, the light from the light emitting unit is diffused and a shadow is formed under the neck of the person who is the subject, compared to the case where the bounce adapter 370 is not used. It is difficult to obtain an image with a more natural atmosphere.

  The bounce adapter detection unit 371 detects whether or not the bounce adapter 370 is attached to the strobe device 300. The detection method by the bounce adapter detection unit 371 may be a known method and will not be described in detail. For example, a method using a switch pressed by a protrusion provided on the bounce adapter 370 may be used, or a method using a magnetic sensor that detects magnetism of a magnet provided on the bounce adapter 370 may be used.

  The wide panel 372 is an optical panel that can be arranged in front of the zoom optical panel 307, and has the effect of diffusing light from the light emitting portion to widen the irradiation range, and mainly corresponds to the angle of view of the ultra-wide angle lens. Used to make. When it is not used, it is stored inside the strobe head unit 300b. When it is used, it is pulled out from the strobe head unit 300b by the user and placed in front of the zoom optical panel 307. That is, the wide panel 372 is held movably between a non-use position inside the strobe head unit 300b and a use position in front of the light emitting unit in the irradiation direction.

  The wide panel detection unit 373 detects the position of the wide panel 372. Since the detection method by the wide panel detection unit 373 may be a known method in the same manner as the detection method by the bounce adapter detection unit 371, the details will not be described. Further, when the position of the wide panel 372 is detected by the wide panel detection unit 373, it may be detected that the wide panel 372 is in the non-use position, or that the wide panel 372 is in the non-use position. You may make it do.

  As described above, the bounce adapter 370 and the wide panel 372 are optical members that can move to a position ahead of the light emitting unit in the irradiation direction, and can expand the irradiation range of the light emitting unit. In addition, the strobe microcomputer 310 has an optical member that can expand the irradiation range of the light emitting unit at a position ahead of the light emitting unit in the irradiation direction based on the detection results of the bounce adapter detection unit 371 and the wide panel detection unit 373. It is determined whether or not to do.

  Next, various processes of the camera body 100 related to auto bounce flash photography will be described with reference to FIGS. When the power switch included in the input unit 112 is turned on and the camera microcomputer 101 of the camera body 100 becomes operable, the camera microcomputer 101 starts the flowchart shown in FIG.

  In step S1, the camera microcomputer 101 initializes its own memory and port. In addition, the state of the switch included in the input unit 112 and preset input information are read, and various shooting modes are set such as how to determine the shutter speed and how to determine the aperture. In step S2, the camera microcomputer 101 determines whether the release switch included in the input unit 112 is operated and SW1 is ON. If SW1 is ON, the process proceeds to step S3, and if SW1 is OFF. Step S2 is repeated.

  In step S3, the camera microcomputer 101 communicates with the lens microcomputer 201 in the lens unit 200 via the communication line SC. Then, the focal length information of the lens unit 200, optical information necessary for focus adjustment and photometry are acquired. In step S <b> 4, the camera microcomputer 101 determines whether the strobe device 300 is attached to the camera body 100. If the strobe device 300 is attached to the camera body 100, the process proceeds to step S5, and if not, the process proceeds to S8b.

  In step S5, the camera microcomputer 101 communicates with the strobe microcomputer 310 in the strobe device 300 via the communication line SC, and obtains strobe information from the strobe microcomputer 310 such as the strobe ID and charging information indicating the charging state of the main capacitor 302d. To do. The strobe information includes information about whether or not the bounce adapter 370 is attached and information about the position of the wide panel 372. The camera microcomputer 101 communicates with the flash microcomputer 310 via the communication line SC, and transmits the lens focal length information acquired in step S3 to the flash microcomputer 310. As a result, the strobe microcomputer 310 calculates the driving amount of the discharge tube 305 and the reflector 306 based on the received focal length information, and moves the discharge tube 305 and the reflector 306 based on the calculated driving amount to thereby operate the strobe device 300. Change the irradiation range to a range that matches the focal length.

  In step S <b> 6, the camera microcomputer 101 prepares to transmit information regarding the strobe device 300 input via the input unit 112 to the strobe microcomputer 310 of the strobe device 300. Here, information regarding the strobe device 300 input via the input unit 112 is determined and converted into command transmission. For example, information such as a camera capable of auto-bounce, camera-side settings relating to auto-bounce, and the state of the release switch is converted into command transmission.

  In step S <b> 7, the camera microcomputer 101 transmits information regarding the strobe device 300 prepared for transmission in step S <b> 6 to the strobe device 300.

  In step S8a, the camera microcomputer 101 determines whether or not the set focus adjustment mode is an automatic focus adjustment (AF) mode. If the mode is the automatic focus adjustment mode, the process proceeds to step S9a. If the mode is the manual focus adjustment (MF) mode, the process proceeds to step S11a. In addition, the step which performs the same process in the flowchart of FIG. 3 attaches | subjects the same number like step S8a and step S8b, for example. In step S9a, the camera microcomputer 101 drives the focus detection circuit 107 to perform a focus detection operation by a known phase difference detection method. In step S9a, a well-known automatic selection algorithm based on the concept of near point priority or a user's operation to the input unit 112 is used as a focus point (ranging point) to be focused from a plurality of focus points in focus adjustment. It decides according to etc. In step S10a, the camera microcomputer 101 stores the distance measuring point determined in step S9a in the RAM in the camera microcomputer 101. In step S <b> 10 a, the camera microcomputer 101 calculates the driving amount of the lens group 202 based on the focus information from the focus detection circuit 107. The camera microcomputer 101 communicates with the lens microcomputer 201 in the lens unit 200 via the communication line SC, and moves the lens group 202 based on the calculated drive amount.

  In step S11, the camera microcomputer 101 determines whether or not to perform an operation (hereinafter referred to as an auto bounce operation) for automatically determining an irradiation direction during bounce flash photography. Whether or not to perform the auto bounce operation is determined based on the state of an auto bounce switch for switching whether or not to execute the auto bounce operation included in the input unit 112 or the input unit 312, the state of the other camera body 100, or the like. The When the auto bounce operation is executed, the process proceeds to step S12, and when the auto bounce operation is not executed, the process proceeds to step S16.

  In step S <b> 12, the camera microcomputer 101 executes processing related to auto bounce operation (hereinafter referred to as bounce processing). Details of the bounce processing will be described later with reference to FIG. After executing the bounce process, the process proceeds to step S13. In step S13, the camera microcomputer 101 determines whether an error has occurred in the auto bounce process. If an error occurs in the bounce process, the process proceeds to step S14. If no error occurs in the bounce process, the process proceeds to step S16. When an error occurs in the auto bounce process, information indicating that an error has occurred in the auto bounce process is transmitted from the flash microcomputer 310 in the bounce process in step S12.

  In step S <b> 14, the camera microcomputer 101 displays information indicating that an error has occurred in the bounce process on the display unit 113. The camera microcomputer 101 may communicate with the flash microcomputer 310, and the flash microcomputer 310 may display information indicating that an error has occurred in the bounce process on the display unit 313 of the flash device 300.

  In step S15, the camera microcomputer 101 switches to a setting for not performing flash photography (non-flash setting) and proceeds to step S16.

  When it is determined in step S4 that the strobe device 300 is not attached, the process proceeds to step S8b, and the camera microcomputer 101 determines whether or not the focus adjustment mode set as in step S8a is the AF mode. . If it is AF mode, it will transfer to step S9b, and if it is MF mode, it will transfer to step S16.

  In step S9b, the camera microcomputer 101 executes processing similar to that in step S9a, and then proceeds to step S10b, performs processing similar to that in step S10a, and proceeds to step S16.

In step S <b> 16, the photometric circuit 106 performs photometry, and the camera microcomputer 101 acquires a photometric result from the photometric circuit 106. For example, when the photometry sensor of the photometry circuit 106 performs photometry in each of the divided areas, the camera microcomputer 101 determines the brightness value of each area as an obtained photometry result as EVb (i) (i = 0 to 5). )
Is stored in the RAM.

  In step S17, the gain switching circuit 108 performs gain switching in accordance with the gain setting input from the input unit 112. The gain setting is, for example, ISO sensitivity setting. In step S <b> 17, the camera microcomputer 101 communicates with the flash microcomputer 310 via the communication line SC, and transmits, for example, gain setting information indicating the gain after switching to the flash microcomputer 310.

  In S18, the camera microcomputer 101 determines an exposure value (EVs) by performing an exposure calculation by a well-known algorithm based on the photometric result (the luminance value of each area stored in the RAM) acquired in Step S16.

  In step S <b> 19, the camera microcomputer 101 determines whether a charge completion signal is received from the flash microcomputer 310. If a charge completion signal has been received, the process proceeds to step S20, and if not received, the process proceeds to step S21.

  In step S20, the camera microcomputer 101 determines an exposure control value (shutter speed (Tv) and aperture value (Av)) suitable for flash photography based on the exposure value calculated in step S18.

  On the other hand, in step S21, the camera microcomputer 101 determines an exposure control value suitable for shooting (non-flash shooting) in which the flash device 300 does not emit light based on the exposure value calculated in step S18.

  After the exposure control value is determined in step S20 or step S21, the process proceeds to step S22. In step S22, the camera microcomputer 101 determines whether the release switch included in the input unit 112 is operated and SW2 is ON. Determine. If SW2 is ON, the process proceeds to step S23 in FIG. 4, and if SW2 is OFF, the process returns to step S2.

  The process after step S23 is a process related to flash photography, and the process related to non-flash photography is a process in which the process for performing the main flash is omitted from the processes after step S23.

In step S <b> 23, the photometry circuit 106 performs photometry in a state where the flash device 300 is not emitting light, and the camera microcomputer 101 obtains a photometry result (non-light emission luminance value) when no light is emitted from the photometry circuit 106. At this time, the camera microcomputer 101 determines the brightness value at the time of non-light emission of each area as the obtained photometric result as EVa (i) (i = 0 to 5).
Is stored in the RAM.

  In step S24, the camera microcomputer 101 issues a pre-flash command to the flash microcomputer 310 via the communication line SC. The stroboscopic microcomputer 310 controls the trigger circuit 303 and the light emission control circuit 304 according to this command, and performs pre-light emission with a predetermined light amount.

In step S <b> 25, the photometry circuit 106 performs photometry in a state where the strobe device 300 is pre-flashed, and the camera microcomputer 101 obtains the photometry result (pre-flash luminance value) during pre-flash from the photometry circuit 106. At this time, the camera microcomputer 101 determines the pre-flash luminance value of each region as the acquired photometric result as EVf (i) (i = 0 to 5).
Is stored in the RAM.

  In step S26, the camera microcomputer 101 raises the main mirror 104 prior to exposure and retracts it from the imaging optical path.

In step S27, the camera microcomputer 101 extracts the luminance value EVdf (i) of only the reflected light component of the pre-light emission based on the non-light-emitting luminance value and the pre-light emitting luminance value as follows. Extraction is performed every six regions.
EVdf (i) ← LN2 (2 ^ EVf (i) -2 ^ EVa (i)) (i = 0 to 5)

  In step S28, the camera microcomputer 101 acquires pre-emission information (Qpre) indicating the amount of light emission during pre-emission from the flash microcomputer 310 via the communication line SC.

  In step S29, the camera microcomputer 101 selects an appropriate light emission amount for the subject in any of the six areas from the distance measurement point, focal length information, pre-flash information (Qpre), and bounce communication content. Then, the main light emission amount is calculated. The bounce communication content also includes information regarding whether or not the bounce adapter 370 is attached and information regarding the position of the wide panel 372. When the bounce adapter 370 and the wide panel 372 are located in front of the light emitting unit in the irradiation direction, the light emitted from the light emitting unit is diffused to reduce the guide number. Is calculated.

In the calculation of the main light emission amount, the subject in the selected region (P) is based on the exposure value (EVs), the subject luminance (EVb), the luminance value EVdf (p) of the pre-emission reflected light only, and the correction coefficient k. Then, the relative ratio (r) of the main light emission amount appropriate for the pre-light emission amount is obtained.
r ← k [LN2 (2 ^ EVs-2 ^ EVb (p))-EVdf (p)]

  Here, the difference between the exposure value (EVs) and the subject luminance (EVb) expanded is taken so that the exposure when stroboscopic light is applied is appropriate by adding the stroboscopic light to the external light. It is for control. Further, when the bounce adapter 370 and the wide panel 372 are not in the front position in the irradiation direction of the light emitting unit, the correction coefficient k = 1. It becomes. Note that since the degree of decrease in light amount differs between the bounce adapter 370 and the wide panel 372, the correction coefficient k is set depending on whether the bounce adapter 370 is in the front position in the irradiation direction or the wide panel 372 is in the front position in the irradiation direction. It may be changed.

  In addition, in order to prevent the pre-emission reflected light component from increasing due to the presence of highly reflective objects (golden screens, etc.) in the shooting screen, the amount of main flash is not calculated too much. There is known a process for performing correction to increase the calculated main light emission amount when a reflecting object is detected. However, when performing bounce flash photography, the high-reflectance object is not detected and the above correction is not performed. This is because, during bounce flash photography, strobe light is not directly irradiated even if a highly reflective object is present in the photographing screen, so that the influence of the highly reflective object on the reflected light component of the pre-light emission is small.

  In addition, at the time of bounce flash shooting, the main flash amount is not corrected according to the position of the subject existing in the shooting screen. As described above, during bounce flash photography, the main flash output is not corrected according to the reflectivity of the subject existing in the shooting screen or the position of the subject in the screen, which is performed during normal flash photography. The main light emission amount suitable for bounce flash photography can be calculated. Here, the normal flash photography is flash photography that is performed with the strobe head unit 300b positioned at the reference position shown in FIG.

In step S30, the camera microcomputer 101 calculates the shutter speed (Tv) during flash photography, the pre-flash emission time (t_pre), and the correction coefficient (c) set in advance by the input unit 112, as shown in the following equation. Use to correct the relative ratio (r) and calculate a new relative ratio r.
r ← r + Tv−t_pre + c

  Here, the correction using the shutter speed (Tv) and the pre-emission light emission time (t_pre) correctly compares the photometric integration value (INTp) at the time of pre-emission and the photometry integration value (INTm) of the main emission. Because.

  In step S31, the camera microcomputer 101 transmits information on the relative ratio (r) for determining the main light emission amount to the flash microcomputer 310 via the communication line SC.

  In step S32, the camera microcomputer 101 issues a command to the lens microcomputer 201 to obtain the aperture value (Av) determined in step S20, and controls the shutter 103 to achieve the determined shutter speed (Tv).

  In step S33, the camera microcomputer 101 issues a main light emission command to the flash microcomputer 310 via the communication line SC. Then, the flash microcomputer 310 performs the main light emission based on the relative ratio (r) transmitted from the camera.

  When a series of exposure operations is completed in this way, in step S34, the camera microcomputer 101 lowers the main mirror 104 that has been retracted from the photographing optical path and again obliquely installs it in the photographing optical path.

  In step S35, the signal output from the image sensor 102 is amplified with the gain set by the gain switching circuit 108, and then converted into a digital signal by the A / D converter 109. The signal processing circuit 111 performs predetermined signal processing such as white balance on the image data converted into the digital signal.

  In step S36, the camera microcomputer 101 records the image data subjected to the signal processing in a memory (not shown), and ends a series of processing related to photographing.

  Thereafter, in step S37, the camera microcomputer 101 determines whether or not SW1 is ON. If SW1 is ON, the process returns to step S22, and if SW1 is OFF, the process returns to step S2.

  Next, details of step S12 will be described with reference to FIG. FIG. 5 is a flowchart of the bounce process executed by the flash microcomputer 310 in accordance with the bounce process start instruction from the camera microcomputer 101.

  In step S101, the stroboscopic microcomputer 310 acquires a result of detecting whether the main body 300a is the normal position or the vertical position by the posture detection circuit 360c. The stroboscopic microcomputer 310 acquires the tilt amount γ of the main body unit 300a detected by the posture H detection unit 360a when the main body unit 300a is in the normal position state. When the main body 300a is in the vertical position, the tilt amount ε of the main body 300a detected by the posture V detection unit 360b is acquired.

  In step S102, the stroboscopic microcomputer 310 can expand the irradiation range of the light emitting unit to a position ahead of the light emitting unit in the irradiation direction based on the detection results of the bounce adapter detection unit 371 and the wide panel detection unit 373. It is determined whether or not exists. The optical member capable of expanding the irradiation range of the light emitting unit refers to the bounce adapter 370 and the wide panel 372. If it is determined that an optical member is present, the process proceeds to step S109. If it is determined that no optical member is present, the process proceeds to step S103.

  In step S103, the flash microcomputer 310 instructs the bounce drive circuits 340b and 340d to drive the flash head unit 300b so that the irradiation direction is the shooting direction (front direction). The drive control when the irradiation direction becomes the photographing direction (front direction) will be described later with reference to FIG.

The amount of driving in the front direction is calculated by the strobe microcomputer 310 by setting the driving target horizontal bounce angle θ _X and the vertical bounce angle θ _Y as target values for bounce driving, and taking into account the amount of tilt of the main body 300a. The For example, when the slope η = 0 and the tilt amount γ = 15 acquired in step S102, the main body 300a is determined to be the normal position, the drive target horizontal bounce angle θ _X = 0 degrees, and the vertical bounce angle θ _Y = Calculated as (0-15) degrees.

  In step S104, the flash microcomputer 310 instructs the light emitting unit to perform pre-flash after driving the strobe head unit 300b so that the irradiation direction is the front direction in step S103. Then, the flash microcomputer 310 instructs the ranging unit 308 to receive the pre-emission reflected light, and calculates the distance (subject distance) from the irradiation surface of the light emitting unit to the subject based on the obtained light reception result. . In step S105, the flash microcomputer 310 instructs the bounce drive circuits 340b and 340d to drive the flash head unit 300b so that the irradiation direction is opposite to the gravity direction (ceiling direction).

If the ceiling direction is the driving target when the posture of the main body 300a is the normal position, the driving target horizontal bounce angle θ _X = 0 and the vertical bounce angle θ _Y = 90−γ are the target values for bounce driving. .

  In step S106, the strobe microcomputer 310 instructs the light emitting unit to perform pre-flash after driving the strobe head unit 300b so that the irradiation direction becomes the ceiling direction in step S105. Then, the flash microcomputer 310 instructs the distance measuring unit 308 to receive the pre-emission reflected light, and calculates the distance (ceiling distance) from the irradiation surface of the light emitting unit to the ceiling based on the obtained light reception result. .

In step S107, the flash microcomputer 310 determines an optimum irradiation direction for bounce flash photography based on the inclination of the main body 300a obtained in steps S101, S104, and S106 and a plurality of distance calculation results (subject distance, ceiling distance). decide. Here, the stroboscopic microcomputer 310 calculates the optimum bounce angle for obtaining the optimum irradiation direction as a drive target horizontal bounce angle θ _X and a vertical bounce angle θ _Y as target values for bounce drive. The method of determining the irradiation direction is, for example, θ _Y = tan ⁻¹ (2d / D) where d is the ceiling distance, D is the subject distance, and the driving target vertical bounce angle θ _Y is the optimal irradiation direction.
It becomes. Since the angle obtained by the above formula is an angle when the posture of the main body 300a is the normal position, the angle corrected according to the inclination angle of the posture of the main body 300a is set as the irradiation direction optimum for the bounce flash photography. comprising determining a driving target vertical bounce angle theta _Y. Further, assuming that the subject exists at the center of the angle of view, the drive target horizontal bounce angle θ _X = 0.

  In step S108, the flash microcomputer 310 instructs the bounce drive circuits 340b and 340d to drive the strobe head unit 300b so that the bounce angle determined in step S107 or the bounce angle determined in step S109 described later is obtained. Let Thereafter, the process proceeds to step S13.

  Step S109 is control when it is determined that there is an optical member capable of expanding the irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction. When it is determined that there is an optical member capable of expanding the irradiation range of the light emitting unit, the stroboscopic microcomputer 310 corrects the predetermined bounce angle determined in advance by the tilt amount of the main body unit 300a acquired in step S101, The process proceeds to step S108.

  Here, the optimum bounce angle when the bounce adapter 370 is attached is set as the first predetermined angle. In this embodiment, the bounce angle at which the irradiation direction of the light emitting unit is the ceiling direction regardless of the subject distance and the ceiling distance is set to the first bounce angle. The predetermined angle is 1. Therefore, the stroboscopic microcomputer 310 calculates the drive target horizontal bounce angle θX = 0 and the drive target vertical bounce angle θY = 90−γ when the main body 300a is in the normal position. Further, the optimum bounce angle when the wide panel 372 is attached is the second predetermined angle. Both the bounce adapter 370 and the wide panel 372 have the effect of expanding the irradiation range of the light emitting portion. However, since the bounce adapter 370 and the wide panel 372 have different diffusion characteristics, the optimum bounce angle is also different. For example, assuming that a vertical angle of view is 75 degrees when a wide-angle lens with a focal length of 16 mm is attached to an imaging apparatus having an imaging element 102 of 35 mm × 24 mm, the irradiation angle in the vertical direction when the wide panel 372 is used. The optimum bounce angle is 45 degrees backward from the ceiling direction. By setting the bounce angle to 45 degrees backward from the ceiling direction, the irradiation angle of the light ray that has passed through the wide panel 372 and closest to the subject becomes 75 degrees, and the light that has passed through the wide panel 372 directly enters the angle of view. It will not be. That is, the stroboscopic microcomputer 310 calculates the drive target horizontal bounce angle θX = 0 and the drive target vertical bounce angle θY = 135−γ when the main body 300a is in the normal position. Note that the optimum bounce angle when the bounce adapter 370 is attached and the optimum irradiation direction when the wide panel 372 is used are not limited to the above-described irradiation directions, and may be set as appropriate in consideration of the respective diffusion characteristics.

  As described above, when it is determined that there is an optical member capable of expanding the irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction, the step is compared with the case where it is determined that there is no optical member. The processing from S103 to step S107 can be omitted. That is, when it is determined that there is no optical member, the irradiation direction of the light emitting unit is determined based on a plurality of distance calculation results obtained by driving the strobe head unit 300b, but when it is determined that there is an optical member. The irradiation direction of the light emitting unit is not determined based on the distance calculation result. Therefore, it can be quickly driven in the optimum irradiation direction, and missed shutter chances can be reduced.

  Next, the bounce drive control in steps S103, S105, and S108 will be described using the flowchart of FIG.

  First, in step S401, the flash microcomputer 310 instructs the bounce drive circuits 340b and 340d to control the motor, and starts driving the flash head unit 300b.

In step S402, the flash microcomputer 310 obtains the horizontal bounce angle θ _A and the vertical bounce angle θ _B that are the current strobe head positions from the bounce position detection circuits 340a and 340c. Then, the flash microcomputer 310 determines whether the acquired current bounce angle matches the drive target horizontal bounce angle θ _X and the drive target vertical bounce angle θ _Y. If they match θ _X = θ _A and θ _Y = θ _B , the process proceeds to step S403, and if they do not match, step S402 is repeated.

  In step S403, the strobe microcomputer 310 instructs the bounce drive circuits 340b and 340d to control the motor, and stops driving the strobe head unit 300b.

  In step S404, the flash microcomputer 310 communicates a bounce drive end notification to the camera via the terminal 130 of the camera connection unit.

  As described above, in the present embodiment, the irradiation direction of the light emitting unit is changed depending on whether or not an optical member capable of expanding the irradiation range of the light emitting unit exists at a position in front of the light emitting unit in the irradiation direction. Different ways of determining. Specifically, when it is determined that there is an optical member that can expand the irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction, the strobe head unit 300b is driven in a preset direction without being driven. The irradiation direction is determined based on the bounce flash photography. This preset direction is a direction in which the direct light from the light emitting unit does not cover the angle of view. Therefore, an unnatural image can be reduced when an optical member that changes the irradiation range is used. At this time, the strobe head unit 300b is not driven in order to calculate the subject distance and the ceiling distance, and the irradiation direction is not determined based on a plurality of distance calculation results, thereby reducing missed photo opportunities. be able to. In this way, the irradiation direction of the illumination device can be determined by a method suitable for using an optical member that changes the irradiation range.

  Note that the flowcharts described in the present embodiment are merely examples, and various processes may be executed in a different order from the flowcharts described in the present embodiment if there is no problem.

  In the above embodiment, the information acquired by the distance measuring unit 308 and the posture detection circuit 360 of the strobe device 300 is used when determining the optimum irradiation direction. However, the information acquired by the camera body 100 is used. Also good. For example, when the strobe device 300 is attached to the camera main body 100, the posture of the camera main body 100 and the posture of the strobe device 300 are in a predetermined correspondence relationship. Information about the posture may be used. As another example, since the distance from the light emitting unit to the subject can also be calculated based on the lens information of the lens unit 200, the distance from the light emitting unit to the subject is calculated based on the information of the lens unit 200. Also good.

  In addition, by calculating the distance from the light emitting unit to the subject and the distance from the light emitting unit to the ceiling, the infrared irradiation unit and the infrared light receiving unit are provided in the irradiation direction of the light emitting unit, and the subject and the ceiling are irradiated with infrared rays. Then, the method of calculating the distance may be used.

  In addition, when it is determined that there is no optical member capable of expanding the irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction, a method for determining the optimal irradiation direction for bounce flash photography is not limited. For example, it is possible to perform pre-flashes by changing the irradiation direction more finely, not only in the front direction and the ceiling direction, and by determining the irradiation direction in which the photometric value during pre-flash is the optimal result for bounce flash photography as the optimal irradiation direction Good. Alternatively, pre-light emission may be performed by finely changing the irradiation direction, and the irradiation direction in which the luminance distribution of the image exposed by the image sensor 102 at the time of pre-light emission has the optimum result may be determined as the optimal irradiation direction.

  In the above embodiment, the strobe head unit 300b is driven in the ceiling direction during the auto bounce operation to determine the irradiation direction. However, the strobe head unit 300b is also driven in the direction orthogonal to the ceiling direction to apply the irradiation direction. May be determined.

  Further, at least a part of the calculation performed by the flash microcomputer 310 when determining the optimal irradiation direction for the bounce flash photographing may be performed by the camera microcomputer 101.

  In the above embodiment, the lighting device has been described in which the movable part can be rotated in the vertical and horizontal directions with respect to the main body part. A possible lighting device may be used.

  In the above embodiment, bounce flash photography is performed so that the irradiation direction is a preset direction both when the bounce adapter 370 is attached and when the wide panel 372 is used. However, only one of them may be used. Even if bounce flash photography is performed so that only one of the irradiation directions is set in advance, it is more unnatural when using an optical member that changes the irradiation range than when neither is performed. Can be reduced.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 100 Camera main body 101 Camera microcomputer 300 Strobe device 300a Main body part 300b Strobe head part 340 Bounce circuit 360 Attitude detection circuit 370 Bounce adapter 371 Bounce adapter detection part 372 Wide panel 373 Wide panel detection part

Claims (13)

An imaging system including an illumination device capable of automatically driving a movable unit including the light emitting unit to change the irradiation direction of the light emitting unit, and an imaging device,
Determining means for determining whether or not there is an optical member capable of expanding an irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction;
Determining means for determining an irradiation direction of the light emitting unit,
The determining means determines the irradiation direction of the light emitting unit according to whether or not an optical member capable of expanding the irradiation range of the light emitting unit exists at a position in front of the light emitting unit in the irradiation direction. An imaging system characterized by differentiating.   When the determination unit determines that the optical member is present, the determination unit determines a direction determined without driving the light emitting unit as an irradiation direction of the light emitting unit, and the determination unit determines that the optical member is 2. The imaging system according to claim 1, wherein when it is determined that the light emitting unit does not exist, a direction determined by driving the movable unit is set as an irradiation direction of the light emitting unit.   The imaging system according to claim 2, wherein the determination unit determines an irradiation direction of the light emitting unit based on a preset direction when the determination unit determines that the optical member is present. . It further has a calculation means for calculating the distance of the object,
When the determining unit determines that the optical member is not present, the determining unit is configured to irradiate the light emitting unit based on the calculation results of the calculating unit with respect to a plurality of objects acquired by driving the movable unit. The imaging system according to claim 2, wherein the imaging system is determined.   5. The imaging according to claim 1, further comprising a driving unit that drives the movable unit so that an irradiation direction of the light emitting unit is an irradiation direction determined by the determination unit. system. A main body detachably mounted on the imaging device;
A movable part rotatable with respect to the main body part;
A light emitting part provided in the movable part;
Driving means for rotating the movable part;
Determining means for determining whether or not there is an optical member capable of expanding an irradiation range of the light emitting unit at a position in front of the light emitting unit in the irradiation direction;
Determining means for determining an irradiation direction of the light emitting unit,
The determining means determines the irradiation direction of the light emitting unit according to whether or not an optical member capable of expanding the irradiation range of the light emitting unit exists at a position in front of the light emitting unit in the irradiation direction. A lighting device characterized by differentiating the above.   When the determination unit determines that the optical member is present, the determination unit determines a direction determined without driving the light emitting unit as an irradiation direction of the light emitting unit, and the determination unit determines that the optical member is The lighting device according to claim 6, wherein when it is determined that the light emitting unit does not exist, the direction determined by driving the movable unit is set as an irradiation direction of the light emitting unit.   The lighting device according to claim 7, wherein the determination unit determines an irradiation direction of the light emitting unit based on a preset direction when the determination unit determines that the optical member is present. . It further has a calculation means for calculating the distance of the object,
When the determining unit determines that the optical member is not present, the determining unit is configured to irradiate the light emitting unit based on the calculation results of the calculating unit with respect to a plurality of objects acquired by driving the movable unit. The lighting device according to claim 7, wherein the lighting device is determined.   The lighting device according to any one of claims 6 to 9, wherein the driving unit drives the movable part so that the irradiation direction is determined by the determining unit. The optical member is an optical accessory that can be attached to and detached from the lighting device,
When the optical accessory is attached to the lighting device, the determination unit determines that an optical member capable of expanding an irradiation range of the light emitting unit is present at a position in front of the light emitting unit in the irradiation direction. The lighting device according to any one of claims 6 to 10. The optical member is an optical panel built in the lighting device and movable between a non-use position and a use position,
The determination means determines that there is an optical member capable of expanding an irradiation range of the light emitting unit at a position ahead of the light emitting unit in the irradiation direction when the optical panel is in a use position. The illumination device according to any one of claims 6 to 11. A main body detachably mounted on the imaging device;
A movable part rotatable with respect to the main body part;
A light emitting part provided in the movable part;
A driving means for rotating the movable part, and a control method of a lighting device comprising:
A determination step of determining whether or not there is an optical member capable of expanding an irradiation range of the light emitting unit at a position ahead of the light emitting unit in the irradiation direction;
Determining the irradiation direction of the light emitting unit,
The determining step determines the irradiation direction of the light emitting unit depending on whether or not an optical member capable of expanding the irradiation range of the light emitting unit exists at a position in front of the light emitting unit in the irradiation direction. The control method of the illuminating device characterized by making different.

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